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JAMES M. wHi'rEMonE, OF'BRIGHTON, iviassaonusums.v

sTEeMfQItEsspecificati@ of Letters raten; No, rs, dated, november 23,1837.

To all 10j/Vomit may concern MORE, ofl Brighton, -county of Middlesex, and State of Massachusetts, have invented,

made, and applied to use a new and useful' improvement in generating steam, or which.

may be otherwise termed an improved steam-boiler for steam-enginesor other purposes to which the same may be applied.

This improvement, the principle thereof,

the several modes in which I have contem-` plated the application of that principle or character by which it may be distinguished from other inventions, together with that part, improvement, or combination which I claim as my invention or discovery, I have fully set forth and described in the following specification and annexed drawings.

Fig. 1 represents a sec-tion of the boiler, which is represented in a vertical position. Fig. 2 is a front elevation of the same, exhibiting the lire and ash pit entrances.

The boiler A is a hollow cylinder of metal constructed and shaped as exhibited in the drawings, or in any other convenient manner.

B is the fire place, inserted in the interior of the boiler, having a flue or smoke tube X connected with its top, thev other end of the said flue being attached to thek top of the boiler or generato-r. Around the exterior of the boiler is another hollow cylinder C, resting on the upper plate a of the wind or ash box D. The lower part of this incasing cylinder is perforated around its edge with openings or holes, for the passage of the smoke or gas evolved during combustion of the fuel, into the second incasing cylinder E, which is formed similar tothe cylinder D, and rests on the upper plate a of the ash box. To the top of this cylinder is aiixed the chimney F, or flue for the nal escape of the smoke or heated air. The tops of the cylinders C and E may be hemispherical, conical or Hat, if desirable. The boiler or generator and its outer cylindrical casings are properly constructed to admit of a fire door and opening into the fire place, as seen at G; also for the gage cocks H, H, H. The wind box serves the double purpose of an ash pit and a receptacle of the air, which is forced in from the revolving fan or blower of the engine, and may be constructed as represented in the drawings, or

f time whenever convenient.

The grate I is hung to the upper plate of the windbox by a hinge joint at @and is keptup a horizontal position, by the pin c passing through the arm d, projecting from the grate. U By.A withdrawing the pin. c the grate fallsvfinto inclined position, and the contents may be removed at any A grate frame may be constructed of metal, simil-ar to a shallow box with a circular or other proper shaped opening through its bottom. In this box, the grate bars may be arranged in number andV distance-from each other as may be most conl y in any other convenient and proper manner. l 'Be 1t known that I, JAMES M. WHITTE.

venient. The box may be hung on a hinge or joint at one end to the lower surface4V o-f the top plate of the wind box, and may have a projecting arm or iron bar and pin from its opposite end (similar to the arm d and pin o) to hold it up in a horizontal position.

The interior of the boiler or generator is preserved from destruction from the immediate action of the tire by the Stealite or Stourbridge clay lining K. The steam and water pipes for supplying steam to the engine and water to the boiler are in serted in any convenient part of the generator, proceeding between and through its casings to the adjacent machinery. The smoke and ame passing up the flue or smoke tube strikes against the underside of thel top plate of the cylinder C, and is deflected through the circular space e e; thence passing through the openings f, f, into the outer annular space g g, through which it rushes and escapes into vthe atmosphere fromr the chimney F;

its course being more particularly denoted by the arrows in the drawing. It will thus be seen that the inside, outside and top surface of the generator is exposed to the action of the flame; and thus a very large surface is brought in immediate contact with the lire; so as to effect a great saving in fuel.

I also construct the boiler and flues as represented by Fig. 3, in which A represents the lire chamber surrounded by water in the outer inclosing case B. The case B communicates with a steam box C by means of a suitable number of pipes a, a. As the llame passes upward, it impinges against the underside of the steam box C, in which the water stands to a proper depth above the fire surface; thence the flame is deflected around and between the pipes a, a, and downward through the passage D D; thus acting on the external surface of the generator B. From this last chamber D D, it passes through the openings E E into the outer casing F F, and ascends and finally escapes through the flue or chimney Gr.

H is a man hole and plate for the purpose of cleansing the, boiler Whenever necessary. vThe iire surface immediately in contact with the flame being mostly if not entirely surrounded by Water, there is scarcely any possibility or chance of burning the metal of Which the boiler is composed.

I claim as my invention and improvement:

The arrangement of the flues in combination with a boiler, having a furnace located and to operate as I have herein JAMES M. WHITTEMORE.

Witnesses:

R. H. EDDY, Espai LINCOLN, SR. 

